Impact of Feedback Delay on System Performance with AMC/SR-ARQ over Rayleigh Fading Channels
In cross-layered wireless networks, Adaptive Modulation and Coding (AMC) and Selective Repeat-Automatic Repeat Request (SR-ARQ) are employed to improve system performance generally. The article focuses on the impacts of feedback delay on such systems over Rayleigh fading channels. It is conducive to choosing more suitable modulation format in AMC by computing Bit Error Rate (BER) based on the second-order statistics method when partitioning SNR levels. Accordingly, we provided Nsucces/ N+1-failure throughput model for performance analysis in this paper. Then simulation results demonstrate that the system considering feedback delay not only does guarantee the average Packet Error Rate (PER) constrains, but also improve system average spectral efficiency.
feedback delay AMC SR-ARQ performance wireless networks
Dandan Hao Junfeng Xiao Shihong Zou Shiduan Cheng
State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunication Beijing,China,100876
国际会议
武汉
英文
2006-09-01（万方平台首次上网日期，不代表论文的发表时间）